NMR tube



FIG. 1 is a front top perspective view of a NMR tube in accordance withthe present design;

FIG. 2 is a front view thereof;

FIG. 3 is a back view thereof;

FIG. 4 is right view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

CLAIM The ornamental design for a NMR tube, substantially as shown anddescribed.